Grade 9 Science Revision

Grade 9 Science Revision

BIOLOGY

Multiple Choice

What is the definition for "a pathogen"?

• an organism that is not transmissible

• bacteria that causes disease

• an organism that causes disease

• virus

Multiple Choice

Which type of microbe can be treated with antibiotics?

• Bacteria

• Viruses

• Fungi

• Protists

Multiple Choice

Why do doctors suggest that people get a flu vaccine each year?

• Viruses replicate more rapidly over time.

• Viruses can mutate from year to year.

• Vaccines are absorbed by the body after a year.

• Vaccines get stronger over time.

Multiple Choice

Why are your chromosomes arranged in pairs?

• Scientists have no idea
• Because you get one from your mom and one from your dad
• Because pairs can divide easier
• Because DNA is awesome

Multiple Choice

The twisted ladder shape of DNA is referred to as a ....

• Twizzler candy
• twisted ladder
• double helix
• yo mama

Multiple Choice

The yellow part of this picture is DNA. What do you think the turquoise part around it is?

• chromosome

• gene

• DNA

• ACTG

Multiple Choice

Which of the following is the body’s first line of defense against disease?

• vaccines
• white blood cells
• antibodies
• skin

Multiple Choice

What am I? I am found in the lungs. I sweep mucus back up towards the throat so it can be coughed out or swallowed.

• Mucus

• Lysozyme enzymes

• Hydrochloric acid

• Cilia

CHEMISTRY

Multiple Choice

A displacement reaction will occur when...

• a more reactive metal displaces a less reactive metal from its compound.
• A less reactive metal displaces a more reactive metal from its compound
• Displacement only occurs when two of the same metals are reacted 
• Displacement reactions will only occur in metals above iron in the reactivity series

Multiple Choice

Iron + copper oxide =

• Iron + copper oxide

• Iron oxide + copper oxide

• Iron oxide + copper

• Magic

Multiple Choice

What term is given to a reaction which transfers heat energy to the surroundings?

• Endothermic

• Reversible

• Exothermic

• Exotermic

Multiple Choice

Earth's crust is broken up into several large rocky pieces called ...

• tectonic plates

• faults

• fossils

• puzzle pieces

Multiple Choice

How is the burning of fossil fuels related to global warming?

• Magic
• Fuels are hot
• Greenhouse effect
• Photosynthesis

Multiple Choice

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

Multiple Choice

In the carbon cycle, producers take in the gas __

• carbon dioxide
• oxygen
• nitrogen
• carbon monoxide

PHYSICS

Multiple Choice

Mass is a measurement of 

• how much matter is present in an object
• how much weight is present in an object
• the amount a spring is compressed on a scale
• none of the answers are correct

Multiple Choice

Grams and kilograms measure...

• capacity

• length

• time

• mass

Multiple Choice

What is the definition of "weight"?

• measure of the force of gravity on your body

• the time it takes to get on a ride

• the amount of matter in an object

• the size of an object

Multiple Choice

Why does this the t-shirt appear red and the shorts appear blue?

• The t-shirt reflects red light, the shorts reflect green light, other colours are absorbed.
• The t-shirt reflects blue light, the shorts reflect red light, other colours are absorbed.
• The t-shirt reflects red light, the shorts absorb yellow light, all other colours are reflected
• The t-shirt reflects red light, the shorts reflect blue light, other colours are absorbed.

Multiple Choice

A dog and a cat are about to fight, running towards each other, both at 12 m/s. What are their velocities relative to each other?

• 12 m/s

• 24 m/s

• 0 m/s

• 6 m/s